According to official release announcement, following are some features introduced in this release.

Implemented support for associating the kiosk clients with Porteus Kiosk Server
- our brand new operating system which allows monitoring, accessing and
managing the clients even if they are placed behind a NAT, proxy or
firewall.

Added support for injecting or replacing default browser
preferences with a text file hosted on the network. For Firefox browser
you may use all preferences listed in "about:config". All supported
Chrome policies can be find here: link.

Online video file can be used as a screensaver instead of the 'Ripples' screensaver or the slideshow.

Added support for session persistence which prevents wiping user data during browser restarts.

Right mouse click state (enabled/disabled) can be controlled through the wizard.

Its possible to share kiosk printer in the network so other PCs could use it.

Added opensource 3D drivers for playing online games and other WebGL usage.

Enabled mp4 (h264 codec) playback in the html5 "video" tag by default in the Firefox browser.

Added support for remote management when kiosk is booted over the network.

Introduced support for local scripts which should be run once networking is initialized and during kiosk shutdown.